Yii2 cannot send email in yii2 -

i'm using yii2 , i'm totally new can me sending emails in framework i'm using swiftmailer , have set configurations as:

'mailer' => [         'class' => 'yii\swiftmailer\mailer',         'usefiletransport' => false, ] 

you need configure transport correctly

in example suppose use gmail, if not true need change values values.

    'mailer' => [         'class' => 'yii\swiftmailer\mailer',         'viewpath' => '@common/mail',         'usefiletransport' => false,         'transport' => [             'class' => 'swift_smtptransport',             'host' => 'smtp.gmail.com',             'username' => 'yourname@gmail.com',             'password' => 'yourpassword',             'port' => '587',             'encryption' => 'tls',         ],     ],